Si- and C-rich structure of the 6H-SiC(0001) surface

L. Li; Y. Hasegawa; T. Sakurai

doi:10.1116/1.589455

Si- and C-rich structure of the 6H-SiC(0001) surface

L. Li, Y. Hasegawa, T. Sakurai

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The reconstructions of the 6H-SiC(0001) surface under both Si-rich and C-rich conditions were studied using field ion-scanning tunneling microscopy (FI-STM). The sample was cleaned by in situ Si beam etching at 900-1000°C. The as-cleaned surface showed a (√3×√3) structure. The Si-rich phases were produced by annealing the sample in a Si flux. With increasing Si concentration, (2×2), (2√3×6√3), (3×3), and (7×7) reconstructions were observed. Reaction of the Si-rich phases with C₂H₂ molecules at 1050 °C resulted in the formation of a C-rich surface, which exhibited a (2×2)/(6×6) reconstruction. A structure model for (√3×√3) reconstruction is proposed, and possible applications of using the surface reconstruction to selectively grow SiC polytype is discussed.

Original language	English
Pages (from-to)	1307-1309
Number of pages	3
Journal	Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Volume	15
Issue number	4
DOIs	https://doi.org/10.1116/1.589455
Publication status	Published - 1997
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Si- and C-rich structure of the 6H-SiC(0001) surface",

abstract = "The reconstructions of the 6H-SiC(0001) surface under both Si-rich and C-rich conditions were studied using field ion-scanning tunneling microscopy (FI-STM). The sample was cleaned by in situ Si beam etching at 900-1000°C. The as-cleaned surface showed a (√3×√3) structure. The Si-rich phases were produced by annealing the sample in a Si flux. With increasing Si concentration, (2×2), (2√3×6√3), (3×3), and (7×7) reconstructions were observed. Reaction of the Si-rich phases with C2H2 molecules at 1050 °C resulted in the formation of a C-rich surface, which exhibited a (2×2)/(6×6) reconstruction. A structure model for (√3×√3) reconstruction is proposed, and possible applications of using the surface reconstruction to selectively grow SiC polytype is discussed.",

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year = "1997",

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AU - Li, L.

AU - Hasegawa, Y.

AU - Sakurai, T.

PY - 1997

Y1 - 1997

N2 - The reconstructions of the 6H-SiC(0001) surface under both Si-rich and C-rich conditions were studied using field ion-scanning tunneling microscopy (FI-STM). The sample was cleaned by in situ Si beam etching at 900-1000°C. The as-cleaned surface showed a (√3×√3) structure. The Si-rich phases were produced by annealing the sample in a Si flux. With increasing Si concentration, (2×2), (2√3×6√3), (3×3), and (7×7) reconstructions were observed. Reaction of the Si-rich phases with C2H2 molecules at 1050 °C resulted in the formation of a C-rich surface, which exhibited a (2×2)/(6×6) reconstruction. A structure model for (√3×√3) reconstruction is proposed, and possible applications of using the surface reconstruction to selectively grow SiC polytype is discussed.

AB - The reconstructions of the 6H-SiC(0001) surface under both Si-rich and C-rich conditions were studied using field ion-scanning tunneling microscopy (FI-STM). The sample was cleaned by in situ Si beam etching at 900-1000°C. The as-cleaned surface showed a (√3×√3) structure. The Si-rich phases were produced by annealing the sample in a Si flux. With increasing Si concentration, (2×2), (2√3×6√3), (3×3), and (7×7) reconstructions were observed. Reaction of the Si-rich phases with C2H2 molecules at 1050 °C resulted in the formation of a C-rich surface, which exhibited a (2×2)/(6×6) reconstruction. A structure model for (√3×√3) reconstruction is proposed, and possible applications of using the surface reconstruction to selectively grow SiC polytype is discussed.

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ER -

Si- and C-rich structure of the 6H-SiC(0001) surface

Abstract

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